Centrifugal machine.



PATENTED OCT. 2, 1906.

` A. J. ERICSSON. GENTRIFUGAL MACHINE.

APPLICATION FILED 00T. 20. 1906.

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.A. J. ERIGSSON.

GENTRIFUGAL MACHINE.

APPLICATION FILED OCT.20. 1905. l

I 2 SHEETS-SHEET 2.

Im'endr:

UNITED "STATES PATENT OFFICE.

ANDERS JOHAN ERICSSON, OF STOCKHOLM, SWEDEN, ASSIGNOR TC AKTIEBOLAGETSEPARATOR, OF STOCKHOLM, SWEDEN.

CENTRIFUGAL MACHINE.

Specification of Letters Patent.

Patented Oct. 2v, 1906.

Application filed October 20, 1905. Serial llo.283,566.

.Machines for Separating Solid Matters from Liquids, of which thefollowing is a full, clear, and exact description, reference being hadto the accompanying drawings, which form a part of this specification.

My present invention relates to centrifugal machines for separatingsolid matter from liquids, and more especially to machines of that kindwherein the solids stratifying on the inner walls of the bowl arebrought transversely -through the layer'of liquid to a point within thesame nearer the center of the bowl by means of Scraper-wheels rotatingon shafts projecting from the bottom of the bowl and rotated from aseparate Shaft.

INith centrifugal machines of this kind the inconvenience arises thatthe Scrapers, whichI always pass the same points of the periphery of thebowl, bring with them the solids which have stratified at such pointsonly, while the l solids at the other points of the periphery are notbrought away.

'My present invention has for its object to tra'sport the solidsstratifying at the bottom of the bowl if the latter be of conical shapeor conveyed to this bottom by any suitable means if the bowl be ofcylindrical shape in theE direction of the periphery to thefpointsabove-thescraper-wheels, whence their own gravity compels them to falldown on the scraper-wheels, which will then carry them away tov thecenter of the bowl, whence they escape outside the bowl. Thistransportation of the solids in thedirection of the periphery isperformed by means of other Scrapers rotating relatively to the bowl,which during their rotation catch up the solids and carry them along theperiphery of the bowl to the points above the scraper-wheels.

My invention is Shown in the annexed drawings, in which- Figure 1 showsa centrifugal bowl in vertical section with my improved device appliedthereto. Fig. 2 is a plan view of the bowl of Fig. 1 with the coveromitted, and Fig. 3 shows a centrifugal bowl of cylindrical shape inwhich the solids are brought down to the bottom by inclined Scrapers.

l a, is the centrifugal bowl, mounted on the top of the hollowdriving-shaft b, within which a massive shaft c is'arranged that shouldbe rotated with a speed different from that of the shaft b. 4cross-piece, which may .take the form, as shown, of a disk d, ismounted, tothe under side of which a cog-wheel c is secured. Thiscog-wheel c meshes with two ycog-wheels g, which run loosely on theshafts f, projecting from the v bottom of the bowl. Said cogwheels g aresecured tothe scraper-wheels fi,

which rotate in cylindrical borings in the bottom of the bowl. To theends of the crosspiece or suitably on two diametricallyfsituated pointsofthe disk d Scrapers 7c arefsecured. Said Scrapers are rotated. byymeans of the shaft c at a Speed different from that of the bowl, So thatthey move along the periphery of the bowl, thereby carrying the solidsalong said periphery. These solids have glided along the conical wall ofthe bowl down If the 'bowl hasa cylindrical shape, the sol- -ids arebrought down to said bottom by some suitable means, one example of whichis shown in Fig. 3. In this figure, a represents a cylindrical bowllprovided with a liner a2, this bowl being of a well-known. type. Therotated parts shown in Figs. 1 and 2 are duplicated in the bowl of Fig.3, and are represented by the same reference-letters, the only changebeing the addition of inclined Scrapers m, secured to orintegral withScrapers 7c, for trasporting the solids down the cylindrical Wa ripheryof thefbowl, they instantly on account of theirvown v gravity fall downon the.

Scrapers t and are then? transported transversely through the layer ofliquid to the discharge-tubesl Z, through which they escape outside thebowl.

On the. top lof shaft c. a

When the Solids are carriedalong thei pe-v to the bottom, where theScrapers 7c operate. f

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bowl and its drivingshaft, and scraperwheels and their separatedriving-shaft, said scraper-wheels being adapted to carry the solidsbrought down to the bottom of the bowl toward the center of the bowl, ofone or more scrapers arranged above said scraperwheels and driven fromsaid separate shaft and thereby caused to move along the inner wall ofthe bowl and to transport the solids along said inner wall in acircumferential direction to points above the scraper-wheels.

2. In a centrifugal machine for separating solids from liquids, thecombination with a rotary bowl, of means located within the bowl forconveying the solid matter to apoint nearer the center line of the bowl,and independent means located within the bowland working along the innerwall of the bowl in a circumferential direction for conveying the solidmatter stratified on the wall in a circumferential direction to therst-named means, the last-named means being Aconstructed to rotate at aspeed different from that of the bowl. f

3. In a centrifugal machine for separating solids from liquids, thecombination with a rotary bowl having one ormore outlets for the solidmatter, of one or more scrapers located within the bowl for transportingthe solidfmatter along the inner wall of the bowl in a circumferentialdirection, and independent means located within the bowl beneath saidscrapers adapted to receive rthe solid matter so transported and conveyit top said outlet. Y

4. In a centrifugal machine for separating solids from liquids, thecombination with a rotary bowl, of scraper-wheels within. the bowlmovable bodily vwith the bowl but having a rotary movement on theiraxes, andone or more scrapers within the bowl and working along theinner wall of the bowl in a circumferential direction for transportingthe solid matter to the scraper-wheels.

5. In a centrifugal machine for separating solids from liquids, thecombination with a i rotary bowl, of rotary scraper-wheels within thebowl whose axes are fixed relatively to the bowl, one or more Scraperswithin the bowl adapted to work along its periphery and transport solidmatter to the scraper-wheels,

, the hollow driving-shaft of the bowl, a separate shaft extendingthrough the hollow shaft of the bowl, and driving connections from theseparate shaft to the scrapers and scraperwheels.

6. In a centrifugal machine for separating solids from liquids, thecombination with a rotary bowl, of rotary scraper-wheels within the bowlwhose axes are xed relatively to the bowl, one or more Scrapers withinthe bowl above the scraper-wheels, adapted to work along its peripheryand transport solid matter to the scraper-wheels, the hollowdriving-shaft of the bowl, a separate shaft extending through the hollowshaft of the bowl, a cross-piece carrying the Scrapers and secured tothe separate shaft, a cog-wheel rotating with the separate shaft, andcog-wheels connected to the scraping-wheels and driven by thefirst-named cog-wheel.

7. In a centrifugal machine for separating solidsfrom liquids, thecombination with a rotary bowl and its hollow driving-shaft, of aseparate shaft extending through the hollow shaft, a cross-piece securedthereto, one -or more Scrapers lsecured to the cross-piece adapted toKwork along its periphery, a cogwheel under the cross-piece and rotatingwith the` separate shaft, shafts projecting upwardly from the bottom ofthe bowl, scraperwheels rotatable loosely on said shafts, cogwheelssecured to and above the scraperwheels, the last-named cog-wheelsengaging and being driven by the first-named cogwheel.

8. In a centrifugal machine for separating solids from liquids, thecombination with a,

rotary bowl, having an outlet for the solids, of scraper-wheels lwithinthe bowl located outside the axis of the bowl and having a movement ontheir axes andadapted to transport the solids to said outlet, and one ormorescrapers within the bowl and movable relatively to both the bowl andthe scraperwheels for transporting the solid matter stratified along theinner wall of bowl intav circumferential direction to points above thescraper-wheels.

In testimony of which vinvention I have hereunto set my hand,atStockholm, Sweden, on this 5th day of October, 1905. v

ANDERS JOHAN ERICSSON,

Witnesses: .Y

HARRY FREDRIK ALBIHN, CARL FRIBERG.

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